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Im making a conical frustum. i need to know how to get the dimensions so i can cut out a shape to wrap around the frame i have built. any ideas?
Bluebirdcoxy
Start with a circle of radius equal to the height of a right cone that would be the extension of your frustum. Measure or calculate from the bottom of the frustum up the side and subtract that from the first radius. This remainder is a radius to form a smaller circle concentric with the first one. Now determine the length around the top and bottom of the frustum. This will correspond to a number of degrees within your circles. Draw this angle from the center to the edge of the outer circle. Now cut out the small circle and then the angle section. This should roll into the shape you want. If you use paper for this, be mindful of the grain of the paper. Poster board only rolls in one direction.
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